E=1 because you would subtract 9 from both sides since it's on the side with the variable. The nines would cancel eachother out so you would have e on the left side then 10-9=1 so it would be e=1
Solution:
The given equation is:

A: Taking , x=1
L H S = 9 × 1 + 49 = 9 + 49= 58
R H S : 
L H S ≠ R H S
B: Taking x=3
L H S = 9 × 3 + 49=27 + 49=76
R HS = 
L H S ≠ R H S
C: Taking x=5
L H S = 9 × 5 + 49
= 45 + 49
= 94
R H S:

L H S ≠ R H S
(D)
when , x= 8
L H S
9 × 8 + 49
= 72 + 49
= 121
R HS:

L H S ≠ R H S
Answer:
The answer is B.
5/6 approximately 0.83 = 83%
71%
0.6 = 60%
56%
Hope this helps! Have a good night!